Published June 15, 2018 © GPL3+

Serial Communication between NodeMCU and Arduino

Serial Communication between ESP2866-12 (NODE-MCU) and Arduino to increase the number of analog pins as my primary work.

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Serial Communication between NodeMCU and Arduino

Things used in this project

Hardware components

Arduino UNO

Arduino MEGA can be used.

NodeMCU ESP8266 Breakout Board

DIYables DHT11 Temperature and Humidity Sensor

DIYables Jumper Wires

DIYables USB Cable 2.0 Type A/B for Arduino Uno

Software apps and online services

Arduino IDE

Arduino IDE with ESP board manager.

adafruit.io

Story

This project is all about serial communication between ESP8266-12(NODE-MCU) and Arduino. As we know ESP-12 have one analog pin where we can connect our analog sensor, But what else if we need more than one analog pin to connect more analog sensor and again if you want to send data to server like adafruit.io or your own server.

A video tutorial to follow, Hope it helps.

Serial communication between Node MCU and Arduino

Code

#include <dht.h>
dht DHT;
int temp,humi;
#define DHT11_PIN A0
String str;
void setup(){
 Serial.begin(115200);
 Serial1.begin(115200);
 Serial.print(char(169)); // Copyright Symbol
 Serial.println(" Myengineeringstuffs.com");
 delay(2000);
}
void loop()
{
  DHT.read11(DHT11_PIN);
  humi=DHT.humidity;
  temp=DHT.temperature;
  Serial.print("H: ");
  Serial.print(humi); 
  Serial.print("% ");
  Serial.print(" T: ");
  Serial.print(temp); 
  Serial.print(char(176));
  Serial.println("C");
  str =String('H')+String(humi)+String('T')+String(temp);
  Serial1.println(str);
  delay(5000);
}